Issue 2, 2023

Organic microspheres and microcrystals made from pyridine-functionalized chromophores and a chiral phosphoric acid

Abstract

Well-defined luminescent micro/nanostructures are important building blocks for miniaturized photonic devices. In this work, a simple method is employed to prepare organic microspheres and crystalline microrods with circularly polarized luminescence (CPL) properties. The in situ protonation and co-assembly of a series of pyridine-functionalized chromophores and a chiral binaphthol phosphoric acid give rise to blue-to-yellow emissive amorphous microspheres and green- and yellow-emissive crystalline microrods with good fluorescence quantum yields (9.6–64.6%). The luminescence dissymmetry factors (glum) of microrods (∼10−3) are found to be one order of magnitude larger than those of microspheres. These microstructures and related materials are further characterized by fluorescence microscopy, scanning electron microscopy, single-crystal and powder X-ray diffraction, and Fourier transform-infrared spectroscopy analyses. The well-defined morphologies and promising luminescence properties of these microstructures make them potentially useful for chiral photonic applications.

Graphical abstract: Organic microspheres and microcrystals made from pyridine-functionalized chromophores and a chiral phosphoric acid

Supplementary files

Article information

Article type
Paper
Submitted
12 Nov. 2022
Accepted
06 Dec. 2022
First published
07 Dec. 2022

J. Mater. Chem. C, 2023,11, 676-684

Organic microspheres and microcrystals made from pyridine-functionalized chromophores and a chiral phosphoric acid

L. Meng, Z. Li, K. Tang, J. Shao, Z. Chen and Y. Zhong, J. Mater. Chem. C, 2023, 11, 676 DOI: 10.1039/D2TC04818C

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